<template>
<!--查询表单-->
<el-form :inline="true" class="demo-form-inline">

  <!-- 所属分类：级联下拉列表 -->
  <!-- 一级分类 -->
  <el-form-item label="视频类别">
    <el-select
      v-model="query.subjectParentId"
      placeholder="请选择"
      @change="subjectLevelOneChanged">
      <el-option
        v-for="subject in subjectList"
        :key="subject.id"
        :label="subject.title"
        :value="subject.id"/>
    </el-select>

    <!-- 二级分类 -->
    <el-select v-model="query.subjectId" placeholder="请选择">
      <el-option
        v-for="subject in subSubjectList"
        :key="subject.id"
        :label="subject.title"
        :value="subject.id"/>
    </el-select>
  </el-form-item>

  <!-- 标题 -->
  <el-form-item>
    <el-input v-model="query.title" placeholder="视频标题"/>
  </el-form-item>
  <!-- 作者 -->
  <el-form-item>
    <el-select
      v-model="query.teacherId"
      placeholder="请选择作者">
      <el-option
        v-for="teacher in teacherList"
        :key="teacher.id"
        :label="teacher.name"
        :value="teacher.id"/>
    </el-select>
  </el-form-item>

  <el-button type="primary" icon="el-icon-search" @click="getPageList()">查询</el-button>
  <el-button type="default" @click="resetData()">清空</el-button>
<!-- 表格 -->
<el-table
  v-loading="listLoading"
  :data="list"
  element-loading-text="数据加载中"
  border
  fit
  highlight-current-row
  row-class-name="myClassList">

  <el-table-column
    label="序号"
    width="70"
    align="center">
    <template slot-scope="scope">
      {{ (page - 1) * limit + scope.$index + 1 }}
    </template>
  </el-table-column>

  <el-table-column label="视频信息" width="300" align="center">
    <template slot-scope="scope">
      <div class="info">
        <div class="pic">
          <img :src="scope.row.cover" alt="scope.row.title" width="150px">
        </div>
        <div class="title">
          <a href="">{{ scope.row.title }}</a>
          <p>{{ scope.row.lessonNum }}集数</p>
        </div>
      </div>

    </template>
  </el-table-column>

  <el-table-column label="创建时间" align="center"  width="100">
    <template slot-scope="scope">
      {{ scope.row.gmtCreate.substr(0, 10) }}
    </template>
  </el-table-column>

    <el-table-column label="作品状态" width="100" align="center" >
    <template slot-scope="scope">
      {{ scope.row.status === 1 ? '已发布' : '未发布'}}
    </template>
  </el-table-column>

  <el-table-column label="发布时间" align="center"  width="100">
    <template slot-scope="scope">
      {{ scope.row.gmtModified.substr(0, 10) }}
    </template>
  </el-table-column>

  <el-table-column label="限制" width="100" align="center" >
    <template slot-scope="scope">
      {{ Number(scope.row.price) === 0 ? '全年龄' :
      '¥' + scope.row.price.toFixed(2) }}
    </template>
  </el-table-column>

    <el-table-column prop="viewCount" label="浏览人数" width="100" align="center">
    <template slot-scope="scope">
      {{ scope.row.viewCount }}人
    </template>
  </el-table-column>

  <el-table-column prop="buyCount" label="收藏用户" width="100" align="center" >
    <template slot-scope="scope">
      {{ scope.row.buyCount }}人
    </template>
  </el-table-column>

  <el-table-column label="操作" width="150" align="center">
    <template slot-scope="scope">
      <router-link :to="'/course/info/'+scope.row.id">
        <el-button type="text" size="mini" icon="el-icon-edit" >编辑视频信息</el-button>
      </router-link>
      <router-link :to="'/course/chapter/'+scope.row.id">
        <el-button type="text" size="mini" icon="el-icon-edit" >编辑视频章节</el-button>
      </router-link>
      <el-button type="text" size="mini" icon="el-icon-delete" @click="removeCourse(scope.row.id)">删除</el-button>
    </template>
  </el-table-column>
</el-table>

<!-- 分页 -->
<el-pagination
  :current-page="page"
  :page-size="limit"
  :total="total"
  style="padding: 30px 0; text-align: center;"
  layout="total, prev, pager, next, jumper"
  @current-change="getPageList"
/>
</el-form>
</template>

<script>
import course from '@/api/subject'

export default {
  data(){
    return{
      listLoading: true, // 是否显示loading信息
      list: null, // 数据列表
      total: 0, // 总记录数
      page: 1, // 页码
      limit: 10, // 每页记录数
      query: {
        subjectParentId: '',
        subjectId: '',
        title: '',
        teacherId: ''
      }, // 查询条件
      teacherList: [], // 作者列表
      subjectList: [], // 一级分类列表
      subSubjectList: [] // 二级分类列表,
    }
  },
  created(){
    this.getPageList()
    this.initSubjectList()
    this.initTeacherList()
  },
  methods:{
    // 获取作者列表
    initTeacherList() {
      course.getAllTeacher().then(response => {
        this.teacherList = response.data.items
      })
    },
    // 初始化分类列表
    initSubjectList() {
      course.getSubjectList().then(response => {
        this.subjectList = response.data.list
      })
    },

    subjectLevelOneChanged(value) {
      for(var i=0;i<this.subjectList.length;i++){
        if(this.subjectList[i].id===value){
          this.subSubjectList=this.subjectList[i].children
          this.query.subjectId=''
        }
      }
    },
    //清空表单
    resetData(){
        this.query = {}
         this.subSubjectList = []
        this.getPageList()
    },
    //条件查询
    getPageList(page=1){
      this.page=page
      this.listLoading=true
      course.getListCourse(this.page,this.limit,this.query)
        .then(response => {
          if (response.success === true) {
            this.list=response.data.list
            this.total=response.data.total
          }
            this.listLoading=false
        })
        .catch(error=> {
            console.log(error)
            })
    },
    removeCourse(id){
    this.$confirm('此操作将永久删除该番剧，以及该番剧下的章节和视频，是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
    }).then(() => {
        return course.removeCourseByCourseId(id)
    }).then(() => {
        this.getPageList()
        this.$message({
            type: 'success',
            message: '删除成功!'
        })
    }).catch((response) => {
        if (response === 'cancel') {
            this.$message({
                type: 'info',
                message: '已取消删除'
            })
        }
    })
        }
  }
}
</script>
